A small baby quilt, a sweatshirt jacket, a journal cover...there are a couple of threads about this today.
A draw string bag, small for little things, or larger for an overnight bag.
A pillow bed, using three regular size pillows and sew a seam between each pillow. Fun for kids to lounge on.
Reusable shopping bags.... too big and you can't carry them. Make sure they have a square bottom for ease of loading & unloading.
Baby bibs, burp cloths or small double sided flannel receiving blankets.
One of those quilted items that go under the sewing machine and have the pockets to hold your tools and a small trash pocket. Maybe called Sewing Machine Mats with pockets.
Arm rest cover for a chair with pockets for remote control pockets.
Whew....bet your are glad I quit thinking.